Speedy winger Stephen Kelly scored the only try of this Division One encounter at Coonagh, helping Shannon to a 16-6 victory over their Limerick rivals UL Bohemians.
Kelly, a regular on Limerick Gaelic football panels in recent years, touched down in the first half for his first try of the league campaign.
Shannon led 13-3 at half-time with Andrew Thompson kicking two penalties to one from Bohs out-half Fergal Lawlor.
A Tadhg Bennett drop goal (57 minutes) and a second Lawlor penalty (66) were the second half's only scores.
Meeting for only the fourth time in the AIB League and with Shannon victorious in two of the three previous clashes, Bohemians looked to be up against it this afternoon but one should remember that Bohs beat the perennial champions 15-6 when they met at Thomond Park last March.
Matches between these two are always particularly tight with place kicks more often than not deciding who take the spoils on the day. So it proved this afternoon with the veteran Thompson, with a little bit of help from last weekend's match winner Tadhg Bennett, kicking Shannon to their third straight win of the league campaign.
Eight-times a Division One winner, Thompson continued to show why he has left such a lasting impression on the league with two excellent penalties after 8 and 17 minutes.
Lawlor managed to reply before Shannon put Kelly over for a fine try in the left corner. It came off scrum ball as centre John Clogan was given crash ball to try and plough to the middle. The Bohs were sucked in and numbers out wide saw captain David Quinlan give the scoring pass to Kelly.
Thompson converted for a 13-3 half-time lead and things were looking good for a Shannon side that included the fit-again Mossie Lawlor at full-back and lock Donnacha Ryan, who is coming back from a hand injury.
The second half was a rather listless affair with defences on top and space at a premium. Well able to defend the most slender of leads, Shannon edged further in front through Bennett and while Lawlor replied for Bohs, their try-scoring chances were far too limited to make any impression in the final quarter.